Fix runtime: restore demo.launch and lazy model load (#5)

- Fix runtime: restore demo.launch and lazy model load (1a62e1aeecc96dcb29d4b73fbf8d27237c021d34)

app.py

@@ -84,5 +84,4 @@ with gr.Blocks() as demo:
     gr.Markdown(description)
 
 
-if my_pipeline is None:
-    my_pipeline = load_pipeline()
+demo.launch()